I currently have a 383 stroker with 4v relief pistons at 10.1 cc, 640 lift solid roller cam. Motor is in a 3300 lb Camaro running 11.58 et. If I get 12.1 dome pistons would that give me a better et? Any suggestions are greatly appreciated.

I think it's 295 duration, not sure on stall brand i just know its a 3200. at least thats what the specs are. i just weighed the car with me in it and its 3360 lbs. im running 11.58 and want to gain at least 5 tenghts.

Its "six of one, half a dozen of the other", mix and match any 2 of the three suggestions above....head and manifold pro ported and 12:1 pistons, or.... 12:1 pistons and 4500-5000 rpm stall, or.... 4500-5000 rpm stall and pro ported heads and intake manifold.

Head flow is likely holding you back more than anything, the -8 Pro is a pretty small head,the smallest head Brodix sells, only 185cc intake runner and flow figures not a whole lot better than a stock Vortec head. Head porting alone will get you the improvement you are after, but it might be cheaper to sell the heads you have and just buy a better set more size appropriate to your engine. Something in the 210-215cc intake runner range.

There might be something to a cam change but without knowing the .050" duration I can't tell you if what you have is a good current match or not. Not 5 tenths worth here though.

A rear gear change might get you up to 1.5-2 tenths, get the car to cross the line in the 7000-7200 rpm area.

I think a head swap or head porting is the only silver bullet" single modification to get what you want.

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